15381923 has 8 divisors (see below), whose sum is σ = 16380000. Its totient is φ = 14394240.

The previous prime is 15381913. The next prime is 15381967. The reversal of 15381923 is 32918351.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15381923 - 2¹² = 15377827 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15381923.

It is not an unprimeable number, because it can be changed into a prime (15381913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578 + ... + 5576.

It is an arithmetic number, because the mean of its divisors is an integer number (2047500).

Almost surely, 2^15381923 is an apocalyptic number.

15381923 is a deficient number, since it is larger than the sum of its proper divisors (998077).

15381923 is a wasteful number, since it uses less digits than its factorization.

15381923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5197.

The product of its digits is 6480, while the sum is 32.

The square root of 15381923 is about 3921.9794747041. The cubic root of 15381923 is about 248.6968078986.

The spelling of 15381923 in words is "fifteen million, three hundred eighty-one thousand, nine hundred twenty-three".